Play until...

I wonder if there is a better way than the code below to play an animation until reaches a position defined by a variable.

      Symbol.bindTimelineAction(compId, symbolName, "Default Timeline", "update", function(sym, e) {

          // insert code to be run on every tick of the timeline here.

          // Be careful not to block or do too much work!

          //get the value of a Symbol variable

          var myVariable = sym.getVariable("myVariableName");

          //check if playhead position reached my Symbol variable

          //must use >= not == to ensure it works

          if (sym.getPosition() >= myVariable) {

                        sym.stop();

          }

Note the code must be in the "update" timeline event to work, but I don't like much to do that. "Stop at" method doesn't work the same way cause it just moves the playhead position instantly, so the animation doesn't run at all.

I miss one more optional parameter in the "Play from" and "Play Reverse from" methods to determine an interval to play. Something like...

sym.play ( start, finish, executeTriggers )

sym.playReverse ( start, finish, executeTriggers )